What are the best practices for JavaScript error handling?

Question

I\'m looking to start making my JavaScript a bit more error proof, and I\'m finding plenty of documentation on using try, catch, finally,

Answer 1

IHMO, you should use error handling in javascript like you do in several other languages (AFAIK: Python, Java).

For better readability (and probably better performance, even though I am not sure it has a really big impact), you should use the try / catch block mostly on the following cases :

• The part of the code you want to wrap is a key part of the whole algorithm. If it fails, it could :

  • create errors on the next part of the codes (e.g. because a var is missing...)
  • make the page not look what expected (impact on content or css)
  • make the results appear strange to the user (impact on the code behavior)

• You know that the code you are writing is not compatible with every browser

• You planned that the code may fail (because there is no other way to check that it should work by if...then... blocks)
• And also when you want to debug without bothering the final user

Eventually, javascript experts may have other elements to give.

my 2 cents to the box,

Regards,

Max